Before ending this section, a few words are in order about the notation used in the manual to refer to the keys of the keyboard. All standard keys are referred to by the symbols which appear on them. For example, in referring to the T key or the $ key, the use of the Shift key is implied in the latter but not in the former. A number of keys may be labeled with words such as `Help' and `Return'. These keys will be referred to by enclosing the labels (or obvious short forms) in <>, such as <Help>, <Return>, <Esc>, etc. Among these keys are also some which can be used in combination with others to create a greater range of possible key commands. Such keys are the <Control> key, the <Alternate> key and the <Shift> key. When these keys are used in combination with others, the notation Ctrl-A, Alt-B, and Shift-C, etc. will generally be used. The notation sh-F1 may sometimes be used as an abbreviation of Shift-F1. The arrow keys will generally be spelled out, for example Shift-left-arrow or Shift-down-arrow, etc. Lastly, it should be mentioned that the keys of the numerical key pad to the right of the keyboard are not used at all except when they are equivalent to the normal keyboard keys, or when they are used in key redefinitions; also, the <Clr/Home> key is mostly used in a way related to the <Home> designation rather than in any capacity related to the word `clear'. Hence this key will be referred to as <Home> instead.